Control apparatus for wave shed forming means

ABSTRACT

Apparatus for controlling the movement of shaft rods in progressive shed looms, that is, weaving looms which perform the simultaneous weaving of weft threads, the shaft rods performing a wave-like harmoniously repeated continuous shedding movement by individual sections. Counter-movement of at least two shaft rods of one section moving in forced opposite directions is provided by one lever means which is phase shifted with respect to the other sections and reciprocates in accordance with the phase shift. The ratio of arms of the lever means is changeable, the point of tipping of the lever means being adjustable. To close the sheds, the symmetrically dead center area of the lifting means of the shaft rods is symmetrically limited, and thereafter the said shaft rods are displaced into alignment.

[ June 19, 1973 United States Patent 1 Kramenic et al.

[ 4] CONTROL APPARATUS FOR WAVE SHED 3,460,582 8/1969 Hindle FORMINGMEANS [75] Inventors: Zdenek Kramenic, Chocen;

12/1959 Germany...................r.l.... 139/12 Vitezslav Vasek; ZbynekMiks; Zdenek Solik, all of Usti nad Orlici Czechoslovakia PrimaryExaminerHenry S. Jaudon AttorneyArthur O. Klein [73] Assignee: VyzkumnyUstav Bavlnarsky, Usti nad Orlici, Czechoslovakia ABSTRACT [22] Filed:Apr. 27, 1971 Apparatus for controlling the movement of shaft rods inprogressive shed looms, that is, weaving looms which perform thesimultaneous weavin ft threads, the

moniously re- Appl. No.: 137,377

g of we ike har l peated continuous shedding movement sections. Counter[30] Foreign Application Priority Data Shaft rods Performing a wave Apr.28, 1970 Czechoslovakia.......,.......

by individual -movement of at least two shaft rods ff .moo S g ma caW oi t 0.. f oo t .m o P of one section moving in forced oppositedirections is provided by one lever means which is phase shifted withrespect to the other sections and rec accordance with the phase shift.The rati the lever means is changeable, the

the lever means being adjustable.

D03d 47/26 ..139/l2,13,16, 55,

[52] US. Cl. [51] Int. [58] Field of Search To close the sheds, thesymmetrically dead center area of the lifting means S T N m S g mm mT SMD E n N U M U of the shaft rods is symmetrically limited, andthereafter the said shaft rods are displaced into alignment.

139/79 9 Claims, 10 Drawing Figures 2,592,820 4/1952 Moessinger.2,841,184 7/1958 3,307,592 3/1967 Patented June 19, 1973 5 Sheets-Sheet1 INVEN TORS 2.05 NEK KRAME N \C.

V IT ezsLAv VASEK ,ZIGNEK MIKSZOENEK SOL! K ATTORNEY Patented June 19,1973 5 Sheets-Sheet 2 uu DENEK sOLIK INVENTORS \ZIDENEL KWEEIFZIKTELSLAY mam ATTORNEY Patented June 19, 1973 5 Sheets-Sheet 5 INVENTORSDENEK KRAMENIK.

Z V|TELSLAVVASEKZ-IBNEK MIKSZoEm-x K my, Q

ATTORNEY Patented June 19, 1973 3,739,816

5 Sheets-Sheet 4 INVENTORS= ZDENEK KRAMEMK, V nelsuw VASEKfLavu-Exmkslnmm SOUK ATTORNEY Patented June 19, 1973 I 5 Sheets-Sheet 5 Thepresent invention relates to an apparatus for controlling the movementof shaft rods in looms with simultaneous weaving of weft threads,wherein the shaft rods perform a wave-like harmoniously repeatedcontinuous shedding movement in which half the number of shaft rods ineach section determine or form the upper part of the shed and the secondhalf of the shaft rods determine or form the alternating lower part ofthe shed.

Various devices for the formation of a wave-like harmoniously repeatedshedding movement have been suggested wherein the individual rods withtheir consecutively arranged shafts have been grouped into sections. Therods, however, in consequence of the space required for the separatelydisposed driving means, could not be arranged in a row, but have beenlaterally offset with respect to one another.

Consequently, in such known devices independent drive means for liftingand lowering every rod are indis pensable, said drive means comprising,e.g. eccentric rotary pins arranged on a common drive shaft traversingthe entire width of the wave weaving loom and, usually, double-armlevers insuring the transmission of the rotary movement of the saideccentric pins angularly shifted with respect to one another, andpossible angularly shifted cams for the respective shaft rods.

Another known apparatus for creating a travellingwave harmoniouslyrepeated shedding movement, employs heddles forming the angle of theshed at the end of which the fabric closes, during the deflection ofthese heddles a shuttle with weft travelling through the shed. Theheddles are threaded at least on one wire which is freely flexible andwhich is gripped at certain intervals by lifting hooks moving forcedlyup and down with a phase shift, inducing thewave-like motion of saidwire. The reciprocating movement of the lifting hooks is actuated bymeans of helically threaded control shafts traversing across the looms.

Further known devices for the formation of a travelling-wave shed inlooms with simultaneous weaving of weft threads consist, among otherembodiments, of rotating cams arranged ,on a cam drum on a common driveshaft passing across the loom, wherein each cam is offset with respectto the adjacent one in a certain phase-shift, and during its rotationaffects a certain number of threads in the warp system, thus impartingdirectly to them the necessary shedding stroke in the series of strokesdetermined by the arrangement of the cams.

Among these devices there can also be mentioned a system ofelectromagnetic selecting means for lifting the heddles, wherein thesaid heddles are hung from a flexible wire on which small weights arefixed at appropriate intervals, said weights operating at the same timeas armatures of electromagnets.

Each of these known devices for creating a wave-like harmoniouslyrepeated continuous shedding movement in which the shaft rods, theheddles, and possibly also the warp threads and the like participate,solves in a way the problems of a progressing shed. However, each ofthem has some specific drawbacks, such as a very high degree of warpthread wear, excessive complexity of production of the machinery,difficult maintenance, and in most cases limited working speed.

It should be stressed quite particularly that the previous known deviceshave been predominantly oriented to the design and the improvement ofmeans capable of producing a continuous wave-like shedding movement,without, however, taking into consideration, to a sufficient extent,some very important requirements on the side of weaving technology,particularly from the viewpoint of the preparation and of the weavingprocess itself.

The known devices substantially lack the possibility, while some of thempreclude it altogether because of their fundamental design factors, ofregulating the value of the amplitudes of all wave sheds, to adjust theheights of individual shafts, further to close all shed waves, thusaligning all warp threads in one plane, and last but not least, thepossibility of drawing in the warp threads outside the loom, or ofexchanging the heddles outside the loom.

The present invention avoids all of the abovementioned disadvantages ofknown devices and methods, while pursuing the aim of creating a simplemethod of controlling the movement of shaft rods, and while taking fullyinto consideration the highly important re quirements of weavingtechnology, so that, for example:

a. the optimum weaving conditions can be adjusted, especially whenweaving from different material, by changing the amplitude (height) ofthe shed wave;

b. all shed waves can be removed, i.e. all warp fell of the just wovencan be aligned into one place to enable the warp threads to be machinejoined;

c. the undesirable sliding of heddle eyes on warp threads is avoided orat least reduced to a considerable degree by arranging the motion ofheddle eyes along a circular path the imaginary center of which lies inthe weaving plane in the area of prewoven fabric;

d. a part or the entire shedding mechanism can be removed, enabling thewarp threads to be more easily drawn in into the eyes of the heddles;this can have a considerable beneficial effect upon the productivity ofthe weaving loom;

e. the arrangement of secured eccentric pins in the rotary connectionsof the shedding mechanism permits very precise adjusting of every rod,and consequently also every shaft with respect to one another, in orderthat the side dead centers of all shafts be identical across the entirewidth of the warp with respect to the weaving plane;

f. the division of the shedding mechanism into single units facilitatesthe assembly of the loom, production thereon, and later on also themaintenance of the loom;

g. the presence of one driving cam or one eccentric member in a sectionserve, in cooperation with a suitable lever means, to actuate allworking movements of the shaft rods, and possibly also the movements ofthe heddles.

In accordance with the invention, the countermovement of at least twoshaft rods of one section moving in forced opposite directions isactuated by a lever means which is phase shifted with respect to theother sections and reciprocates in accordance with the phase shift; theratio of arms of the lever means is changeable and the point oftipping-being adjustable; after excluding the cams, while symmetricallylimiting the dead center area of the lifting means of shaft rods, thesaid shaft rods are displaced into alignment.

Further advantages and features of the invention will be more fullyexplained in the following detailed description read with theaccompanying drawings in which:

FIG. 1 is a side view of the general embodiment of one section of afirst embodiment of the extractable shedding mechanism with a horizontaldrive, a control system and mechanism for closing the shed waves;

FIG. 2 is a side view of the general embodiment of an alternativeextractable shedding mechanism with a vertical drive and a mechanism forclosing the shed waves;

FIG. 3 is a view in plan of an alternative embodiment of the sheddingmechanism according to FIG. 2, the drive mechanism being omitted forclarity of illustration;

FIG. 4 schematically illustrates the lifting means of the shaft rods andshows the paths of the heddle eyes;

FIG. 5 is a view of the cam and its adjacent link of the drive mechanismof one section;

FIG. 6 is a view in cross-section of a cam and a link of the drivemechanism, the section being taken along line 6-6 of FIG. 5;

FIG. 7 is a detailed illustration of a rotatable and shiftableconnection of the control system and the lifting means of the shaft rodsusing a secured eccentric P FIG. 8 is a view in axial section of therotatable and shiftable connection according to FIG. 7, the sectionbeing taken along the line 8-8 of FIG. 7;

FIG. 9 is a diagrammatic representation of the device for closing theshed waves in one section;

FIG. 10 is a fragmentary view in front perspective of a loomincorporating the shedding mechanism shown in FIGS. 1 and 2 of thedrawings.

The following description relates to one section of the sheddingmechanism only, the plurality of other sections in the loom beingidentical.

As shown in FIG. 1, the shedding device according to the presentinvention consists of four main units cooperating with each other: adrive mechanism 1, a lifting means 2, a control system 3, and a devicefor eliminating the shed waves and bringing all of the warp threads intoa single plane. The shedding device has main frames 5.

In a basic embodiment of the extractable or removable shedding mechanism1 with a so-called horizontal drive (see FIG. 1) the drive mechanism 1is formed substantially by a drive shaft 11 which crosses the loom andby earns 12 (one shown) with which the shaft is provided. The cams 12are angularly displaced with respect to each other with a certain phaseshift, and their number corresponds with that of the individual sectionsof the shedding mechanism, which is further determined by the weavingwidth of the loom and by the number of cycles of the shed wave.

Each of the cams 12 is provided at both sides with a shouldered hub 121(FIG. 5) which is continuously contacted with the guiding surface 13a ofspaced parallel glide members 13, 13' of a horizontally arranged link15. At the side with which it is adjacent to cam 12 the link 15 has theshape of a double fork with an inserted roller 14. The ends of thebifurcated lever 15, arranged one above the other, carry cross bars 16which are adjustable around a pin 17, each bar 16 being provided with aslot 18 through which a fixing bolt 19 extends. A second roller 14 isdisposed be tween each pair of these cross bars l6.

The rollers 14, 14 of the link 15 roll around the cam 12, the shape ofwhich insures a constant distance of the centers of rollers 14, 14'during their continuous rolling around the cam 12, while the connectingline 123 of said centers always intersects the axis of rotation 122 ofcam 12.

As shown in FIG. 1, the link 15 is pivotally connected by means of a pin210 to a lever 21 which forms part of the lifting means 2. The lever 21has at one end a head 211 (at the top in FIG. 1) and a fork 212 at theother end. The lever 21 is connected to the direct lever lifting means 2for the rods 25 and 27 of shafts (not illustrated) by means of said head211. These direct lever lifting means 2 comprise at least one three-armlever 22 and one double-arm lever 24.

The three-arm lever 22 of the lifting means 2 is rotatably connectedwith the head 211 of the lever 21 and is pivotally mounted on a lowerpin 221' of the holder 222 of the section. The second, intermediate armof the three-arm lever 22 is pivotally connected to the lower end of therear rod 27 of the shaft; an upper guide arm 28 which is rotatablymounted on the upper pin 221 of the holder 222 of the section ispivotally connected to rod 27. The upper pin 221 also serves as thefulcrum of the adjacent double-arm lever 24. One arm of the double-armlever 24 is pivotally connected to the front rod 25 of the shaft, rod 25being pivotally connected at its lower end to a lower guiding arm 26,which is rotatably mounted close to the three-arm lever 22 on the commonlower pin 221 of the holder 222 of the section. The second arm of thedouble-arm lever 24 is pivotally cross-connected by means of aconnecting rod 23 back to the third arm of the three-arm lever 22. Thisentire unit, which consists of a holder 222 with a threearm lever 22 anda lower guide arm 26 rotatable on the lower pin 221, and the upper guidearm 28 with the double-arm lever 24 on the upper pin 221, and the frontand rear rods 25 and 27 of the shafts, is independently extractable fromthe frame of the loom.

The control system 3 is carried by the cross beam 53. System 3 has itsvertical position determined by set screws 301 and is secured inadjusted position by bolts 302. Two or more brackets 30 arranged to forma rigid unit on the cross beam 53 carry two shafts 31 and 41 parallelwith the cam shaft 11. Shaft 31, which is fixed, is provided with a setof bell cranks 32 which can be turned individually; the number of cranks32 is the same as the number of lifting means 2. As shown in FIGS. 7 and8, the generally vertical arm of bell crank 32 carries an eccentric pin34 with a fixing bolt 35. On the eccentric pin 34 a slide 33 is looselyjoumalled so that it can be shifted to project into the fork 212 of thelever 21, serving as its tipping point.

At the outer end of the other am of the bell crank 32a disc 321 isrotatably mounted, disc 321 being gripped by the open edge of thesurfaces 421, 420 (FIG. 9) of the functional part of a segment 42, whichis arranged on a rotatable shaft 41.

By adjusting the eccentric pin 34 the slide 33 is shifted in the fork212 on the lever 21, thus changing the position of slide 33 with respectto the axis V (FIG. 1), and, consequently, also the mutual verticalposition of the rods 25 and 27. By the vertical shifting of the brackets30 on the cross bar 53 the transmission ratio of the arms of all levers21 change to a rather considerable extent.

On the rotatable shaft 41 there is disposed a row of segments 42 thenumber of which is the same as that of the discs 321, that is, thenumber of the sections. All of said segments are simultaneouslycontrolled by turning the shaft 41 by means of a sprocket 43 (FIG. 9).The chain 44 which is entrained over the said sprocket 43 passes intoengagement with the sprocket 45 of the profile bar 452, then passes in areverse direction about sprocket 46 of profile bar 462, and thence tocoil tension spring 47, as shown.

The profile bars 452 and 462 of the device 4 for closing the shed wavesare fixedly secured to the respective rotatable shafts 451, 46 1. Saidbars are disposed across the loor'n'in the area of the dead centers ofindividual heads 211 of the levers 21, that is to say, in the area ofthe dead centers of the lifting means 2, e.g. the threearm levers 22.

The described shedding device is arranged between sidewall members 51which are connected to each other by cross beams 52, 53. The sheddingdevice is accommodated on rollers 54, 54', thus permitting the entireshedding device to be extracted out of its guiding means (not shown) onthe inner confronting sides of the said sidewalls 51.

The described apparatus operates as follows:

Before the beginning of the working (weaving) process the individualelements of the shedding device are in a position illustrated in FIG. 1,where there is shown an embodiment with a horizontal drive. The bellcrank 32 of the control system 3 is held by the segment 42 of the device4 for closing the shed waves, while its disc 321 is held in a positionin which the axis of the eccentric pin 34 lies in the level of the axisV passing through the axes of the pins 221, 221 of the holder of thesection 222. The heads 221 of the lever means 21 form, in the horizontaldirection, a wave line corresponding with the angle of turning of eachcam 12 of the drive 1. This horizontal wave line is transformed into avertical wave line by the lifting means 2, determining the position ofindividual shaft rods, e.g. 25. Simultaneously, the shaft rods 27 aremoved through the same distance from the axis of symmetry of said waveline, but in the opposite direction. The process goes on as follows:

v The head 211 of the lever means 21 moves from the left to the right,and thus tips the three-arm lever 22 around the pin 221 of the holder222 in a counterclockwise direction, i.e. the shaft rod 27 movesupwards, controlled by the guide lever 28, supported exactly over thethree-arm lever 22. Through the effect of the connecting rod 23, itssecond arm transmits the movement to the double-arm lever 24 mounted onthe common upper pin 221 of the holder of the section 222. Consequently,the shaft rod 25 connected with the double-arm lever 24 performs themovement downwards, turning the lower guide lever 26 counterclockwisearound the lower pin 221' of the holder of the section 222, Le. oppositethe direction of rotation of the three-arm lever' 22. After the loom hasbeen switched on, the shaft 11 with the cams 12 starts rotating, and thelinks guided by glide members 13, 13 follow by means of the rollers 14,14' the circumferences of the cams 12, rolling around the shoulderedhubs 121 of cams 12. Thus the rotational movement is transformed into alinear one which is transmitted to the levers 21 which are swingablearound the eccentric pins 34. Then the heads 211 of the lever means 21impart a wave-like harmoniously repeated movement by means of thelifting means 2, and a continuous shedding movement to the shaft rods25, 27 in the direction of the picked weft threads (not shown).

In case a change of the adjustment of the height of shed waves isrequired, the bolts 302 of the control system 3 are loosened. By turningset screws 301 appropriately the entire system of bell cranks 32 is thenmoved as required, including the segments 42, on the brackets 30 in thevertical direction. During the upward movement, the slides 33 enterdeeper into the forks 212 of the lever 21. The distance of the head 21 1from the pin 210 of the lever 21 is constant, as is also the stroke ofthe link 15, but the distance between the pin 210 and the eccentric pin34 has decreased, whereas the length of the path of the moving head 211of the lever 21 has increased, thereby increasing the height of the shedwave. When the control system 3 starts its operation in the downwarddirection, the opposite situation sets in; the path of the movement ofthe head 211 of the lever 21 has decreased and thus also the height ofthe shed wave is less.

The function of the device 4 for closing the shed waves comprises twooperations dependent upon each other. Turning now to FIG. 9, first ofall the fixed fulcrum of the lever 21 formed by the eccentric pin 34 ofthe slide 33 is eliminated by turning the shaft 41 with the arranged setof segments 42 by pulling the chain 44 by chain control means (notshown) in the direction X from the position given by the axis Y to theposition of the axis X At the beginning of this phase, the discs 321 arereleased from the grip of the open wedge of the segments 42. By thecontinuing pull of the chain 44, the spring 47 is tensioned and undersimultaneous turning of the sprockets 45, 46 the thus actuated movementis transmitted to the shafts 451, 461 of the profile bars 452, 462.Because the chain 44 is stretched between the sprockets 45, 46crosswise, the profile bars 451, 461 turn in opposite directions fromthe position Y to the position X As the result of both these rotarymovements, the space between the profile bars 452, 462 becomes narrower,and the said bars start aligning the levers 21, which have formed ahorizontal wave-line, into one row by means of pressing upon the heads211 of said levers. This is possible only because the forks 212 of thelevers 21 have no fixed position and because the fulcrum point of thetipping levers 21 has been transferred to the axis of the pin 210 of thelink 15. When the heads 211 have been aligned in a row through theaction of the turned profile bars 452, 462 (see FIG. 9) a situation setsin wherein the axes of all members 221, 221', 211 will be in one commonlevel V. The eliminated waveline of the heads 211 will be again observedon the bell cranks 32 and their rollers 321. All arms of the levers 22,26, as well as of the levers 24, 28 of the transmission device, havecome into exact alignment and consequently also the eyes of the heddles(not shown) of the shafts have grouped themselves at the level of theweaving plane (not shown) of the loom.

By eliminating the force acting upon the chain 44 in the direction X,the tension of the spring 47 results in its movement in the direction Y.Through its effect, the profile bars 452, 462 turn from the position ofthe axes X to the position of the axes Y,, thus increasing the spacebetween the profile bars 452, 462 to the original width. The chain 44,turning the sprocket 43 of the shaft 41 tips the segments 42 from theposition X to the position Y Owing to the curvature 420 of the segments42, the pressure in the upwards direction effects the discs 321 of thebell cranks 32 forming the lower half-waves of the shedding wave. Themovement transmitted by the slide 33 on the fork 212 of the levers 21adjusts the said fork at the level V. The levers 21which have beentipped around the pin 210 actuates the stroke of one half of the shaftrods 25, 27 (the upper shed) by means of the respective levers of thelifting means 2. By continuing the tipping of the segments 42 in thedirection towards the position of the axis Y the discs 321 of the bellcranks 32 forming the upper halfwave of the shedding wave-line bearconsecutively against the function surface 421 of the segment 42. Thepressure resulting from this contact, which is transmitted by the lever21 on the transmission mechanism 2, brings about the movement of theremaining half of the shaft rods 25, 27 (the lower shed). The discs 321are gripped by the wedge of the function parts 420, 421 of the segments42; the position of the eccentric pins 34 is thus secured on level V andthe loom is prepared for switching on.

Turning now to FIG. 2, there is there shown an embodiment of the presentinvention with a so-called vertical drive. Except for the control system3 of FIG. 1, the embodiment of FIG. 2 is substantially identicaltherewith. The arrangement of lifting means 2 in FIG. 2 is the same asin FIG. 1, only the sidewalls 55 of FIG. 2 have been changed. Avertically movable link 151 has been also mounted on can 12 in the sameway, while at the end with which it meshes with the horizontal arm ofthe three-arm lever 22 it is provided with an open groove 152 which isdirected, in the central position of the stroke of the link 151, towardsthe turning point of said three-arm lever 22.

Every link is provided with a slot 153 with a transverse pin 416 whichis connected, by means of at least two connecting bars 415, with thesleeves 414 of at least two eccentric members 411 arranged on a commonshaft 410. The eccentric members 411 are further provided with fixedfingers 412, which are connected with one another by means of the rod413. After the eccentric members 411 have been turned and the link 151has been shifted out of engagement with the threearm lever 22, rod 413limits, at least from one side, the area of the dead centers of thelifting means 2, thus forming, in combination with the other drivingmeans, the device 4 for closing the shed waves.

In the embodiment of FIG. 2, the vertical movement of the link 151 isderived from the cam 12 on the shaft 11 directly on the three-arm lever22 of a transmission mechanism 2 as above-described. In order to closingthe shed waves, the lifting means 2 must be disconnected from the drivemechanism 1. By turning the control shaft 410 counterclockwise, theeccentric member 411 rotates in the sleeve 412. The resultant horizontalforce of their movement is transmitted by the connecting bars 415 on thetransverse rod 416 in the grooves 153 of the links 151. The deflectionoflinks 151 from the vertical position sets in, and the pins 155 of thethree-arm levers 22 move out of engagement with the forks 152 of thelinks 151. With the rotating of eccentric members 411, the fingers 412,interconnected by the rod 413, lift from the position Z Approximately,during the second half of its stroke into the position Z,, the rod 413begins to lift one half of the three-arm levers 22 one after the otherand one half of the guide levers 26 forming the wave-line of the shaftrods 25, 27 of the lower shed. As long as there are three-arm levers 22in the section of the transmission mechanism 2 in the lower half of theworking stroke, they are lifted by the pressure of the rod 413, untilthe guide levers 26 bear against the rod 413 in a countermotion derivedfrom the said three-arm levers 22 by means of double-arm levers 24 andshaft rods 25. If there are guide levers 26 in the lower half of theirstroke at the given moment, the force imposed upon them by the risinglever 413 causes all shaft rods 25, which have been forming the lowershed to move upwards, as well as the arms of the double-arm levers 24connected with the bars 25, to rise. The other arms of these levers,moving in the opposite direction, press the three-arm levers 22 with theconnected shaft rods 27 by means of the connecting rods 23 until theshed waves are closed at the moment determined by the position Z offinger 412 of the eccentric member 41 1. In this position the wholetransmission mechanism 2 can be shifted in the sidewalls 55 in thedirection of the warp beam. This is also the only suitable position fordisassembling the machine. The preparation of the shedding mechanism forthe working position, i.e. the simultaneous opening of the shed waves,is performed by turning the shaft 410 with the eccentric members 411from the position Z to the position 2,. The rod 413, supported by thefingers 412 of the eccentric members 411, releases the support of thethree-arm levers 22 and the lower guiding levers 26. Simultaneously, theconnecting rods 415 attract the links 151 from the tipped position intothe vertical position by means of the transversal rod 416. The pins onthe three-arm levers 22, which have been arranged into a verticalwave-line, are drawn to the narrowed part of the fork 152 by means ofthe movement of the links 151 and through the cooperation of thebroadened forks 152 of the links 151. During the said drawing-in of thepins 155 the shaft rods 25 and 27 assume positions corresponding withthe position of the earns 12 of the shaft 11 of the drive mechanism 1.The entire transmission system is then able to reproduce the movementdetermined by the drive mechanism 1.

Although the invention has been illustrated and described with referenceto a plurality of preferred embodiments, it is to be expresslyunderstood that it is in no way limited to the disclosure of such aplurality of embodiments, but is capable of numerous modificationswithin the scope of the appended claims.

What is claimed is:

1. In a wave weaving loom, an apparatus for controlling the movement ofshaft rods, the apparatus being arranged in a frame and divided intosections extending across the loom, each section comprising an upperone-armed guiding lever mounted on an upper pin in the frame, an upperdouble-arm lever swingably mounted on the upper pm,

a lower one-armed guiding lever swingably mounted on a lower pin,

a lower three-arm lever swingably mounted on the lower pin,

a front shaft rod jointly connected to one arm of the upper double-armlever and to the lower onearmed guiding lever,

swingably a rear shaft rod jointly connected to one arm of the lowerthree-arm lever and to the upper one-armed guiding lever,

a connecting rod jointly connecting the second arm of the upperdouble-arm lever with the second arm of the lower three-arm lever,

a double-arm driving lever, one arm of which being jointly connected bymeans of a head to the third arm of the three-arm lever,

a driving mechanism jointly connected to the doublearm driving lever,

a swingable bell crank, one arm of which being swingably and shiftablyconnected to the second arm of the double-arm driving lever,

a segment disposed on a shaft extending across the loom and securing thesecond arm of the bell crank,

two rotatable profile bars arranged on both sides of the head andextending across the loom, the rotatable profile bars being coupled tothe segment.

2. Apparatus according to claim 1, comprising a sprocket attached to theshaft,

two sprockets, one of which is attached to one of the rotatable profilebars, the second being attached to the other rotatable profile bar,

a chain tensioned by a spring and meshing with the sprocket of theswingable segment via the two sprockets of the profile bars.

3. Apparatus according to claim 1, comprising a fork on the second armof the double-arm driving lever,

a slide slidably mounted in the form and jointly connected to one arm ofthe bell crank,

a bracket extending across the loom and slidably mounted in the frameand in which the shaft is rotatably mounted and the bell crank swingablymounted,

a set screw for shifting the bracket and arranged in the frame, and

a bolt for securing the bracket in its position.

4. Apparatus according to claim 1 comprising a drive shaft extendingacross all the sections of the apparatus,

a cam disposed on the drive shaft and displaced with respect to cams ofother sections. with a certain phase shift, said cam being provided witha shouldered hub on both of its sides,

a double bifurcated link jointly connected to the double-arm drivinglever,

two parallel glide members arranged on the double bifurcated link andbeing in contact with the shouldered hub,

two rollers engaging the cam on either side thereof,

two cross bars on which a roller is rotatably mounted and adjustablymounted on the link, each of the cross bars being provided with a slotthrough which a fixing bolt extends.

5. Apparatus according to claim I, wherein the frame comprises twosidewall members connected to each other by cross beams and equippedwith rollers and separably mounted in the loom.

6. Apparatus according to claim 5, wherein the upper pin and the lowerpin are mounted on a holder, the latter being removably mounted in theframe and wherein the head is disengageable.

7. Apparatus according to claim 1, wherein the axes of the pins and therotating axis of the bell crank lie on a common straight line.

8. Apparatus according to claim 1, comprising a vertically movable linkcoupled to the driving mechanism, said link engaging the third arm ofthe three-arm lever and being provided with a slot,

a transverse pin extending through the slots of the links of all thesections,

at least two horizontal connecting bars arranged on both sides of theapparatus,

sleeves fixed to the ends of the connecting bars,

eccentric members arranged on a common shaft and rotatably mounted inthe sleeves,

fingers fixed on the eccentric members, and

a rod connecting the fingers.

9. Apparatus according to claim 8, comprising a pin on the third arm ofthe three-arm lever, said last-named pin engaging a groove in the link.

1. In a wave weaving loom, an apparatus for controlling the movement ofshaft rods, the apparatus being arranged in a frame and divided intosections extending across the loom, each section comprising an upperone-armed guiding lever swingably mounted on an upper pin in the frame,an upper double-arm lever swingably mounted on the upper pin, a lowerone-armed guiding lever swingably mounted on a lower pin, a lowerthree-arm lever swingably mounted on the lower pin, a front shaft rodjointly connected to one arm of the upper double-arm lever and to thelower one-armed guiding lever, a rear shaft rod jointly connected to onearm of the lower three-arm lever and to the upper one-armed guidinglever, a connecting rod jointly connecting the second arm of the upperdouble-arm lever with the second arm of the lower three-arm lever, adouble-arm driving lever, one arm of which being jointly connected bymeans of a head to the third arm of the three-arm lever, a drivingmechanism jointly connected to the double-arm driving lever, a swingablebell crank, one arm of which being swingably and shiftably connected tothe second arm of the double-arm driving lever, a segment disposed on ashaft extending across the loom and securing the second arm of the bellcrank, two rotatable profile bars arranged on both sides of the head andextending across the loom, the rotatable profile bars being coupled tothe segment.
 2. Apparatus according to claim 1, comprising a sprocketattached to the shaft, two sprockets, one of which is attached to one ofthe rotatable profile bars, the second being attached to the otherrotatable profile bar, a chain tensioned by a spring and meshing withthe sprocket of the swingable segment via the two sprockets of theprofile bars.
 3. Apparatus according to claim 1, comprising a fork onthe second arm of the double-arm driving lever, a slide slidably mountedin the form and jointly connected to one arm of the bell crank, abracket extending across the loom and slidably mounted in the frame andin which the shaft is rotatably mounted and the bell crank swingablymounted, a set screw for shifting the bracket and arranged in the frame,and a bolt for securing the bracket in its position.
 4. Apparatusaccording to claim 1 comprising a drive shaft extending across all thesections of the apparatus, a cam disposed on the drive shaft anddisplaced with respect to cams of other sections with a certain phaseshift, said cam being provided with a shouldered hub on both of itssides, a double bifurcated link jointly connected to the double-armdriving lever, two parallel glide members arranged on the doublebifurcated link and being in contact with the shouldered hub, tworollers engaging the cam on either side thereof, two cross bars on whicha roller is rotatably mounted and adjustably mounted on the link, eachof the cross bars being provided with a slot through which a fixing boltextends.
 5. Apparatus according to claim 1, wherein the frame comprisestwo sidewall members connected to each other by cross beams and equippedwith rollers and separably mounted in the loom.
 6. Apparatus accordingto claim 5, wherein the upper pin and the lower pin are mounted on aholder, the latter being removably mounted in the frame and wherein thehead is disengageable.
 7. Apparatus according to claim 1, wherein theaxes of the pins and the rotating axis of the bell crank lie on a commonstraight line.
 8. Apparatus according to claim 1, comprising avertically movable link coupled to the driving mechanIsm, said linkengaging the third arm of the three-arm lever and being provided with aslot, a transverse pin extending through the slots of the links of allthe sections, at least two horizontal connecting bars arranged on bothsides of the apparatus, sleeves fixed to the ends of the connectingbars, eccentric members arranged on a common shaft and rotatably mountedin the sleeves, fingers fixed on the eccentric members, and a rodconnecting the fingers.
 9. Apparatus according to claim 8, comprising apin on the third arm of the three-arm lever, said last-named pinengaging a groove in the link.